Automatic door



en., 3.933. F. KUGLER, .5R LSQLB AUTOMATIC DOOR Filed May lO, 1930@Ifo/wey Patented Feb. 14, 1933 1,897,311

UNITD STATES PATENT FFIC FRANK KUGLER, JR., OF BREMEN, SASKATCHEWAN,CANADA AUTOMATIC DOOR Application led May 10, 1930. Serial No. 451,394.

My invention relates to door opening and ing of the usual kind to whichthe intervenclosing devices one of the objects of my ining space in thewall communicates throughvention being to provide mechanism of a out theVertical length of the door opening semi-automatic character for openingand forming a pocket for reception ofthe door closing doors and thelike, operable by the which may be framed and iinished similar 55application of pressure through utilization to a simple studdedpartition and the door of the weight of the user, opening linished asdesired, the outer side A further object of my invention is to proof theopening being closedv by the frame 4. vide a door opening and closingdevice that Suspended in the door opening is av door can be operatedwith equal facility from operating on a guide rail 6 which extends 60either side 0f the door Combining a manual llltO the pOClet 'Ormed irlthe Wall Structure. operation of a semi-automatic character forSuspension of the door is secured by proviopening the door with anautomatic closing sion of rollers 7 7 attaching to the toprail Yoperation and further to carry out the openof the door by straps 8 8permitting sliding i5 ino and closing action without use of theactuation of the door on the guide rail. 65 hands providing a convenientarrangement Below the door 5 set in a suitable opening 9 for use wherenecessary conditions make such pIOVlCled in the iool 3 in horizontalalignuse of the hands inconvenient. ment with the door opening is aninverted A still further object of my invention is to box forming atreadle structure comprising a provide a door opening and closing deviceof H001 Section or platform l0 looselyiitting 70 such a character thatcan be installed Within the Opening 9 and provided with side walls out;interference with the regular Wall and ll-ll braced as desired, the SaidStructure iioor construction to the extent of encroachbeing Clesiffnedt0 Operate as a treadle for ing on available space and withoututilizaactuation of the operating mechanism.

tion of visible mechanism out of harmony The opening in the floor 3 isprovided with 75 with surroundings. a depending casing generallyindicated at l2 With the above and other objects in view enclosing thearea below theopening 9 and my invention resides in the combination ofdesigned to receive the treadle structure and parts hereinafter moreparticularly described act as a guideway and lateral support there- 3oand claimed reference also being had to the for the said casing l2forming a part of the 80 accompanying drawing, wherein like characiioorconstruction and being extended if deters of reference are used toindicate like sired to enclose the whole of the operating part-sthroughout the different views and mechanism below the Hoor level.

wherein Pivotally attaching to the side walls 11-11 Fig. l is a sideelevation of a door susof the treadle by means of suitable connecting S5pended in a wall structure illustrated with pins is a forked levercomprising a pair of my opening and closing mechanism installed spacedapart arms 1313 convergingly inand attached thereto, part of the wallstrucclining at their cuter extremities tor receive an ture being forconvenience of illustration interposed link 14 pivotally attachingthereshown broken away. to by a connecting pin 15. The inner ex- 90 lFig. 2 is a sectional view illustrated as tremities of the arms 13-13 ofthe forked taken on a line 2 2 of Fig. l, showing the lever are arrangedin a loose pivotal attachconstruction of the platform and connectionment to the side walls 11-11 of the treadle lever. structure through themedium of links 16-16 Referring to the drawing l indicates the attachedto said arms and side walls by sut- 95 rear facing of a Wall structure,2 the front able connecting pins or the like. The said facing and 3 thefloor, the whole being mereforked lever is arranged when in horizontally indicative of any usual wall construction position to support thefloor section 10 of the inclusive of an intervening air space. treadlestructure level with the main floorto Formed in the wall structure is adoor opeuing 3.

Y angle thereof is attached the link 14 forming an operating connectionwith the forked lever. To the upper extremity of the vertical leg of thelever 17 is pivotallyattached a link 19 which attaches to the innermargin of the door 5 by means of an eye bolt or the like.

Further attached to the horizontal leg of the leverl 117 is acounterweight 20 of suitable weight to counterbalance the force requiredc for the'openi-ng operation of the door. The

said weight is adJusted to exercise sufficient counter action tonormally retain the door closed and the forked lever in a normalhorizontal position or to automatically restore the door, when open, toits normal closed position.

spect relative extension of the platform area could be included in thestructure.

Having thus described my invention what I claim is The combination witha spaced apart wall provided with a door opening, a horizontallyreciprocating door mounted to close the -opening having an angled leverpivotally mounted connected for actuation of the door and havingV acounterweight automatically operable to move the door into anormalclosed position, and a floor structure in conjunction with thewall formed with an opening below the door opening, of a treadlestructure for opening the door comprising a forked lever intermediatelysuspended in the floor structure with the forked end ofthe lever alignedwith the floor opening, an open boX structure vdepending from the floorsurrounding the opening therein, a platform pivotally supported on theforked arms of the lever and mounted vertically slidable in the boxstructure, and a link connecting the other end of the forked lever totheangled lever.

FRANK KUGLER' JN'IOR.

, In the operation of the device a person steppingpand imposing theirweight on the Hoor section of the treadle structure depresses the saidstructure and throughconnection of the links 16-16 forces the inner endof the forked level downward elevating the outer extremity. of the saidlever which through connection of the link 14 actuates the lever 17 inopposition to the counterweight and through the link 19 draws back onthe door 5 sliding the said door on the guide rail 6 into the wallpocket provided therefor.

Release of the pressure on the platform 10 allows the counterweight 20to come into play forcing downward on the horizontal leg of the lever 17and through the connection of the link 19 with the vertical leg of thesaid lever forcing the door closed again. Operation of the lever 17serves through its connecting link 14 to restore the forked lever to itsnormal horizontal position andelevate the platform 10 to its normalposition on a level with the main flooring. l

Through the relative unequal balance of the forked lever only a veryslight depression of the platform 10 is required for the operation ofthemechanism the weight so applied ultimately through provision of thecounter- Weight 20 serving the dual purposeof opening and closing thedoor 5.

In its conception the structure as herein designed is applicable to avariety of purposes wherev an easily operable door structure of thischaracteris advantageous. The structure can also be adapted to beutilized in connection with a pair of sliding doors closing into contactat a common center by provision of a double leverage system such forinstance as for garage purposesV and the like, in which rellO

